Door-spring



' fornia, have invented UNITED lSTATES PATENT OFFICE.

ALTON D. PHELPS, OF GALT, CALIFORNIA.

Doon-SPRING.

SPECIFICATION forming part of Letters Patent No. 530,852, dated December11 1894. Application led May 3, 1894. Y Serial No. 509,969- (No model.)

To all whom it may concern,.-

.Be it known that I, ALToN D. PHELPs, a citizen of the United States,residing at Galt, inthe county of Sacramento and State of Calia new anduseful DoortSpring, of which the following is a specifica- The inventiondoor springs. The object of the present invention is to improve theconstruction of door springs, and to provide a simple and efticient one,which will not create the creaking noises, usually incident to suchdevices.

The invention consists in ythe'eonstruction and novel combination andarrangement of parts hereinafter fully described, illustrated 111 theaccompanying drawings, and pointed out in the claims hereto appended.

In the drawings: Figure l is a perspective view of a door springconstructed in accordance with this invention, and shown applied to adoor. Fig. 2 is a longitudinal sectional View. Fig. 3 is a transversesectional view, the section being taken through the sliding plate. Fig.4 is a detail perspective view of the sliding plate. Fig. 5 is a similarview of the guide.

Like letters of reference designate corre- .spending parts in all thefigures of the drawings. t

Referring to the drawings, c' designates an attachment plate secured toa door frame a, at the edge thereof, adjacent to a door b, and providedat its top and bottom with vertically aligned eyes c', arranged adjacentto the hinged edge of the door, and receiving a pintle d, upon which ismounteda spiral spring relates to improvements in l e connected with thedoor and the door frame,

and adapted to hold the yformer normally closed, and to close the samein the usual manner. The springis constructed of a single piece ofresilient wire or similar material, which is centrally doubled to form aloop arm f, and which is spirally coiled at opposite sides of the loopand arranged on the vertical pintle d. The terminals c ofA the wire, ofwhich the spring is constructed, are extended outward to form arms whichbear against the outer face of the attachment plate c.

The centrally arranged loop of the spiral spring is linked into the eyeg of the sliding plate h, and the latter is rectangular, and is mountedin a horizontal guide c mounted on the door, whereby when the door isopened and closed the plate h slides freely, and preventsany creaking ofthe spring, and at the saine time avoids any unnecessary strain whichwould impair the efficiency of the spring and lessen its durability. Thehorizontal guide, which is provided at its top and bottom withperforatedY ears to receive the fastening devices for attaching it tothe door, consists of a fiat plate and horizontally disposed parallelside flanges Z, which receive and embrace the upper and lower edges ofthe sliding plate, and vform a way forthe same. The sliding plate isprovided on its linner face with a longitudinal rib z', which isarranged in .a longitudinal groove m of the plate of the guide. The ribz' is rectangular in cross-section, and the groove m, which is formed inthe outer face of the plate of the guide, conforms to the configurationof the rib. As the door is opened and closed the sliding plate movesfreely back and forth in the way formed by the guide, and enables thespring to perform its function of closing the door with great ease andefticiency, and it greatly contributesto the durability of the spring; pY

The attachment plate and the guide are let into the door frame and thedoor, and the outer face of the attachment plate, and the outer face ofthe plate portion of the guide, are Hush with the adjacent faces of thedoor v frame and the door.

It will be apparent that the door spring is simple and comparativelyinexpensive in construction, that it is adapted to be readily applied toa door, and that it is capable ofoperating noiselessly to close adoor'and maintain the same normally in that position.

Changes in the form, proportion, andthe minor details of constructionmay be resorted to without departing from the principle or sacriicingany of the advantages of this invention. v

What I claim is- 1. A device of the class described, comprising a springdesigned to be mounted ona door frame and provided with an arm, a guidedesigned to be secured to a door and provided with 'side Iianges andforming a way, and a sliding plate mounted in the guide and em- ICOflanges thereof and provided on its inner face with a rib arranged insaid groove, said sliding plate being provided on its outer face with aneye and having the loop of the spring linked into the same,substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two Witnesses.

ALTON D. PHELPS.

Witnesses:

EDGAR GIBBoNs, CHARLES C. CLEMENTS.

